Calculating-machine.



H. S. BOOTH.

CALCULATING MACHINE.

1,227,033. APPLICATION FILED MAY 2, 1912. Patented May 221917,

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APPLiCATIOH FILED MAY 2, 1912.

,Patented May 22,1917.

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WITNESSES I INVENTOR H. S- BOOTH.

CALCULATING MACHINE.

APPLICATION FILED MAY 2, 1912.

Patented May 22, 1917-;

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1 CORPORATION or new YORK.

Y {UNITED STATES PATENT v HENRY sHEPLnY'noo'rn, or maucnnsrnn, ENGLAND, assxenoiafnrntnsnn rssxa 2 'mnn'rs, 'ro unnnnwofon comrn'rme MACHINE COMPANY, or nnw 1033,1141, 1-K

To all whom it may concern 7 Be it known that I, HENRY SHEPLEY BOOTH, a British. subject, residing at Manadding and subtracting adapted to be fitted- 10 to type-writing machines wherein the action chester, county ofiLancaster, England, have invented certain new and useful Improvements in Calculating-Machines, of which the following is a specification.

This invention rel or depression of a. numeral key operates the "calculatingmechanism and also projects a type carrying bar against an inked ribbon and platen to print and record the item.

The object of the invention is to provide means to print a special mark or character.

.upon the paper only when all the totalizer wheels are at zero, to prevent such mark or character being printed at any other position of the wheels and to print onthe paper a second mark or character'adjacent to any numeral printed thereon which has been sub-- tracted.

The invention will be described with ref erence to the accompanying drawings in whlch suliicient of a typewrlting machine is shown to illustrate the invention.

Figure 1. is a frontelevation. Fig. 2. is a side elevation. Fig. 3. is an elevation of the tens wheels,

' the arms associated therewith, and the nary or known construction as is also the calculating mechanism coupled to the nuner'al keys of the typewriter.

' The key K is one of the ordinary numeral keys and the key K is a key with a marking such as two horizontal lines by printing.

, which several times a double ruling may be eflected. This key may have any other marking. to be printed to indicate the'end of a calculation.

I provide a locking mechanism operated by the totaliz'er wheels to lock the key K tes to machines for.

the link it.

formed with a hook toengage the pin'r of CALCULATING-MACHINE;

- andrprevent it being operated to print the doubleruhng except when all the totalizer wheels are at zero; When therefore a total is to be printed the machine should be set to subtraet and the, suhtraction'thereof, as it is; being pr1nted,-will return all the wheels to zero, This will" unlock .the key K, and the ability to operate it and print, the-double ruling (orother marking) willprove'that the transcription ofthe total is correct. .If

an error has been made in transcribingthe total, the key K will not be unlocked and cannotbe operated.

The drum or boss w of each of the totalcut therein to receive a correspondingV piece on end of an armor leverP which is in position to engage therewith whenthe wheel indicates zero.

The arms P-one for each set of wheels-'- are mounted upon a spindle S carried across the back of the totalizer and journaled in the frame of the machine. I thespindle S a swinging rod R is fitted,

said rod carrying at its lower'end a. pin 7',

and to the key K a lever L is connected-by The lever L is at its free end the swinging rod R. A similar arm P also on thespindle S, engages a V notch on the pence wheel W When all the wheels W and W are at zero andthearms are in the several notches, the swinging rod R hangs" perpendicular, the pin 1' is free of the hooked.

end of the lever L, and the key K is free to I be operated and printthe double rule or dis-- tinctive mark thereon. Should however any one of the wheels W? or fW not beat. zero,

theswin in arm R is moved into en 'a ement with the hooked end of. the'lever Ii thus lockingv the key K and-preventingit from beingoperated. For tens of shillings, the-Wheel W has .five. V notches and the H i pence wheel. W isfitted With-a notch to" correspond with zero on the pence indicator,

F2 fitted a a stant angle. 11, the spindles itally, to

. 155 izer wheels W is provided with a V notch On the end of Specification-of Iietters Patent. PatentedMay 1917; Application filed ma 2, i912. Serial 110,694,742.

har'T is mounted on the the ordinary type bars. The type bar T is fitted with a character, such as 'a dot or stroke, which is printed when struck by the type bar along with the numeral thereon, to indicate that the numeral then printed has been subtracted. The type b'ar T is elastic or jointed, being made of preferably spring steel. It is coupled to acrank lever t and operated by a cam A through a lever a and link a. The link a. is slotted to allow the platen to be lowered and throw the auxiliary type bar out of action except when the platen is in position to print numerals.

The cam A is mounted on the spindle B by which the totalizer is changed from addition to subtraction. The rotation or turning movement which efi'ects this change rotates the cam A and moves the auxiliary type bar T into the path of the numeral type bars, andv any one of these, on being operated, will strike the bar T and force or bend it against the ink ribbon and paper and simultaneously print its distinguishing mark with the numeral, to indicate that the number in question has been subtracted by the calculating mechanism.

The auxiliary type bar may be moved into position to print when the mechanism is set to add, if so desired, by altering theposition of the cam A, but at present I prefer to use itto indicate subtraction.

I do not claim herein broadlythe combination of a totalizer, means for printing a characteristic mark, mechanism for locking said printing means, and means re lering locking mechanism ineffective when said totalizer stands at zero; nor do I claim herein broadly the combination of a totalizer, a key for printing a characteristic mark, mechanism for locking said key, and means for rendering said locking mechanism ineffective when said totalizer stands at zero; said combinationsbeing broadly covered by the application of Frederick A. Hart, Serial No. 662,873, filed November 28, 1911.

What I claim as my invention and desire to protect by Letters Patent is 1. In a calculating machine adapted as a type-writing machine, the combination, with the numeral type bars and the totalizer, of an auxiliary type bar to print a distinctive marksimultaneously with the numoral, and means for automatically moving the auxiliary type bar into the path of the numeral type bars when the totalizer'is set for calculating operation of a given character, substantially as described.

2. In a calculating machine adapted as a type-writingmachine, the combination, with a 'totalizer, of apparatus to print a distinctive mark when the totalizer is at zero, and to print a distinctive mark simultaneously with the numeral when the mechanism is set means to set said state-indicating sign tov printing position and to change the control of the computing mechanism by said keys to print the totals standing on the computing mechanism and thereby clear the same, a clearance printing sign, and means for causing the positioned state-indicating sign to print by the action of said numeral keys as an incident to the printing of a total thereby, saidkeys also acting to enable said clearance sign to print at the conclusion of the printing of the total and the clearing of the computing mechanism.

4. I In a computing machine, the combination with computing mechanism, of numeral printing keys for controlling said. computing mechanism, a. state-indicating sign, a. clearance sign, a lock for said clearance si n normally effective to prevent printing y said clearance sign, means for positioning said state-indicating sign to printing position and for chan ing the control of said computing mechanism by said keys to cause a change of state of said computing mechanism, and means to cause said positioned state-indicating sign to print, as said numeral keys are operated to print the digits corresponding to the total standing on said computing mechanism and to clear said computing mechanism, said numeral printing keys While thus printing the total acting through the medium of said computing mechanism to release said lock to enable said clearance sign to be printed.

5. In a combined typewriting and computing machine having a computing mechanism, numeral types, and numeral keys controlling said numeral types to print the numhers run up on said computing mechanism; the combination of a special printing type, the printing action of said type being under the joint control of the computing mecha nism and one of said numeral keys.

6. In a combined typewriting and computing machine having a. computing mechanism, numeral keys controlling said mechanism, and a state-controlling mechanism for determining the addition or subtraction condition of said computing mechanism; the combination of a special printing ty e, the printing action of said ty e being under the joint control of any one 0% said numeralkeys and said state controlling mechanism.

7. In a combined typewriting and computing machine having a computing mechanism, numeral keys controlling said mechanism, anda state-controlling mechanism for det r ining the :additionfor "s'fubtracti on cons dition of said computing mechanism; the

combination of a. special printing'type, the printing action of said type being under the 8. In a combined typewriting, and computing machine haying'numeral types and computing"mechanism, numeral keys controlling sald numeral types to print the numbers carried into the computing mechanism,

and a state-controlling mechanism for determining the addit on or subtraction condition of said computing mechanism; the combination with a. special printing type and means under control of the statecontroll1ng mechanism for interposing said specialtype into the path of movement of a numeral type, whereby said special type is operated to print on the operation or said numeral type.

9. In a combined typewriting and computing machine having numeral types and computing mechanism, numeral keys controlling said numeral types to y print the numbers carried into the computing mechanism, and a state-controlling mei'rhanism for determining the addition or subtraction condition of said computing mechanism; the combination and means under control of the state-controlling mechanism for inter-posing, said special type into the path of movement of any one of said numeral types, whereby said special type is operated to print on the operation of any one of said numeral types.

10. In a combined typewriting and computing machine having con'iputing me nism, numeral types for printing digit digit the number computed by said computing mechanism; the combination with special printing type to indicate the state of the computing mechanism as to addition or sub.- traction, said type being, actuated to print as incident to the printing of the number digit by digit by said numeral types.

11. In a cmiiputiiig machine the combination with numeral keys, computing mecha nism controlled by said numeral keys, and digit printing mechanism, of a special print ing' sign and means to enable said numeral keys to cause said special printing sign to .mechanism as to addition or subtraction.

13. In a combined' typewriting and computing machine ha lng computing mechavith-a special printing type;

' to indicate the state ofthe compnting mechanism as to addition or subtraction.

ll. In a computing machine, the combination with computing mechanism, of mimeral printing keys for controlling said computing mechanism and for printing the digits computed, and a special printing sign for showing the state as to addition or sub- .traction of said computing mechanism, the

printing by said special printing sign being caused by said numeral keys.

15. In a computing machine,'the combination with computing mechanism, of numeral printing keys for controlling said computing mechanism and printing the digits computed, a special printing sign, and means for causing said special printing sign to be printed as said numeral printing keys print'the digits of a number tobe computed.

16. In a combined typeWrit-ing and'computing machine, the combination with type writing mechanism including a platen and printin mechanism relatively shiftable to control the printing of different characters on said platen, of computing mechanism, means for determining the state of said com puting mechanism, a specialprinting sign, and ineans dependent upon theposition of said state-determining means and the relatire position of said printing mechanism and platen -for positioning said sign.

ll". in a combined typewritingj and compu ie, the combination with typesign, and means dependent upon the posi-- tion of said statedetermining means and the relative position of said printing mechanism and platen for positioning said sign to be actuated by said numeral keys to print.

18. in a. combined typewriting and computing machine, the combination with type- Writing mechanism,including aplaten and printing mechanism relatively shiftable to control the printing of different characters on said platen, of computing mechanism, means for determining the state of said c0mputing mechanism, a special printing sign, numeral printing keys for'printing digit by iism including a platen and digit the computed number, and meansde- In testimony whereof I have hereunto set pendent upon vthe position of said state-demy-hand in presence of V0 subscribing wittermining means and the relative position messes.

of 'seidprinting mechanism and platen for HENRY SHEPLEY BOOTH. positioning said Si? to be actuated by said Witnexes:

numeral printing eye, as they print digit J; OWDEN OBnnm,

by digitN GEO. H. OBRIEN. 

